address #10965; mention Glyphicons-over-file:// problem in Carousel example
another grid .row mention
Merge pull request #11016 from twbs/address-10965

address #10965; mention Glyphicons-over-file:// problem in Carousel example
mention .dropdown-backdrop and .open in dropdown docs /cc #10102
mention .modal-open and .modal-backdrop in docs /cc #10102
Merge branch 'master' of github.com:twbs/bootstrap
mention tooltip markup in docs per #10102
mention .invisible in docs per #10102
mention .invisible in docs per #10102
drop .tabbable since it's unused and undocumented /cc #10102
comment and spacing